The molar mass of the water insoluble product formed from the fusion of chromite ore with in presence of is ______ g . [2025]

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Solution

Q.
The molar mass of the water insoluble product formed from the fusion of chromite ore $({FeCr}_{2} O_{4})$ with ${Na}_{2} {CO}_{3}$ in presence of $O_{2}$ is ______ g ${mol}^{- 1}$ . [2025]

Ans.
(160)

$4 {FeCr}_{2} O_{4} + 8 {Na}_{2} {CO}_{3} + 7 O_{2} \to 8 {Na}_{2} {CrO}_{4} + 2 {Fe}_{2} O_{3} + 8 {CO}_{2}$

${Fe}_{2} O_{3}$ is insoluble in water. Its molar mass $= [2 \times 56 + 3 \times 16]$ $g/mol$

$= 160 g/mol$

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